Oh, forgot to mention, I believe Jeff's groove can be heard on the track Cherish (Like A Prayer). There's no specific credit to that, but I read it in a mag somewhere. One listen, and it will confirm it I think!

I hate it when there's no credits. There's too many examples of this!!

Ahhhhhhhhhhh,
this hunting for Jeff Porcaro uncredited track is gettin VERY INTERESTING....
I also vote for "Cherish" being a Jeff Porcaro's take.

On the same album, I'm pretty sure it's Johnathan "sugarfoot" Moffet on "Like a prayer".
Pay attention to his trademark rolls on the hi-hat and the fact that they are played mostly with the tips only, not with the shoulders. Plus his hi-hat sound doesn't recall the Paiste sound.

Bill Champlin "Runaway" album is an A.O.R. masterpiece, very highly recommended.